Abstract
A dual band circularly polarized MSA using the MSA with one pair of crank-shaped slit at each edge is proposed for wireless sensor network. The antenna is fed by an L-probe feed. The proposed antenna satisfies the specification of the bandwidths of 3dB-axial ratio with -10dB-|S11| (2.401GHz-2.481GHz). Moreover, the antenna has the radiation characteristic with wide beam width.